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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

onsemi 2SC3953E-PM-ON

Name: 2SC3953E-PM-ON
Brand: onsemi
SKU: 2SC3953E-PM-ON
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SC3953E-PM-ON

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-225AA, TO-126-3

Datasheet:: 2SC3953E-PM-ON.pdf

Description:: TRANS NPN 120V 0.2A TO-126ML

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Product details

Overview

2SC3953E-PM-ON from SANYO is an NPN epitaxial planar silicon transistor designed for high-frequency video output stages in high-definition CRT displays, featuring f_T = 400 MHz, V_CEO = −120 V (min), C_re = 1.7 pF at V_CB = −30 V, I_C = −200 mA max, and P_C = 1.3 W in TO-126ML package.

For engineers reviewing the 2SC3953E-PM-ON datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, complementary PNP/NPN pairing context, HF amplifier design guidance, and real-world video output use cases - all grounded in SANYO's official TS No.2437 documentation.

Technical Context

This NPN transistor operates as a wide-band video output amplifier with high-voltage capability and low reverse transfer capacitance, enabling stable gain up to 400 MHz under V_CE = −10 V and I_C = −50 mA conditions. Its FBET process ensures tight h_FE distribution across h_FE1 (I_C = −50 mA) and h_FE2 (I_C = −100 mA) bins.

The device shares mechanical and thermal design with its complementary PNP counterpart 2SA1538, both housed in micaless TO-126ML plastic packages rated for T_j = 150 °C maximum junction temperature and −55 °C to +150 °C storage range.

Key Specifications

Parameter	Value and Actual Design Meaning
f_T	400 MHz - Enables wideband video amplification up to UHF frequencies without gain roll-off.
V_CEO	−120 V min - Supports high-voltage CRT anode drive and deflection circuit operation.
C_re	1.7 pF at V_CB = −30 V - Minimizes Miller effect for improved high-frequency stability.
I_C (max)	−200 mA - Sustains peak video current demands in CRT line-output stages.
P_C	1.3 W at T_c = 25 °C - Delivers sufficient power handling for continuous video signal swing.
h_FE1	20–120 at V_CE = −10 V, I_C = −50 mA - Ensures predictable DC biasing in linear output stages.
V_CE(sat)	−1.0 V at I_C/I_B = 10 - Limits conduction loss and thermal rise during saturation switching.

Pinout & Package

2SC3953E-PM-ON uses the SANYO TO-126ML (micaless) plastic package - a 3-pin through-hole outline with integrated heat-dissipating tab, optimized for medium-power video output mounting without insulating washers.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal	Connected to ground or low-impedance return path; polarity defines NPN operation.
2 (Collector)	High-voltage output node	Drives CRT deflection yoke or anode load; electrically tied to metal tab for thermal conduction.
3 (Base)	Control input	Accepts bias current to regulate collector current; requires stable voltage reference for linear operation.

Key Features

Feature	Design Value
High f_T	400 MHz - Maintains flat gain response across NTSC/PAL video bandwidth (up to 6 MHz) with margin.
High breakdown voltage	V_CEO ≥ −120 V - Eliminates need for external snubbers in CRT horizontal output circuits.
Low Cre	1.7 pF - Reduces feedback-induced oscillation risk in high-gain video driver configurations.
Complementary pairing	Matched with 2SA1538 - Enables push-pull video output stages with symmetrical slew rate and distortion.
FBET process	Controlled h_FE spread - Simplifies production binning and reduces need for per-unit bias trimming.

Applications

High-Definition CRT Video Output	Wide-Band Amplifier Stage
Use Scenario: Final-stage amplification of RGB or composite video signals driving CRT electron gun modulation. IC Role / Device Role / Timing Role: NPN switch/amplifier operating in Class-A or Class-AB mode with fast turn-on/turn-off transitions. Use Value: Delivers 1.3 W dissipation and 400 MHz f_T to preserve luminance/chrominance fidelity without phase shift.	Use Scenario: Broadband signal conditioning in test equipment or broadcast monitors requiring flat 0–10 MHz response. IC Role / Device Role / Timing Role: Linear gain block with minimal group delay variation across frequency band. Use Value: Low C_re (1.7 pF) and high V_CEO (−120 V) enable stable wideband operation without neutralization networks.
Horizontal Deflection Output	High-Voltage Switching Load Driver
Use Scenario: Driving flyback transformer primary winding in CRT horizontal scan circuits. IC Role / Device Role / Timing Role: High-voltage, medium-current switch synchronized to line frequency (15.734 kHz). Use Value: V_CEO ≥ −120 V withstands flyback spikes; TO-126ML tab enables direct heatsink mounting for pulsed dissipation.	Use Scenario: Controlling high-impedance loads such as CRT focus/anode supplies or EHT regulation stages. IC Role / Device Role / Timing Role: Linear regulator pass element or precision current source in HV feedback loops. Use Value: Tight h_FE binning (h_FE1: 20–120) supports accurate current mirroring and stable loop gain.

High-Definition CRT Video Output

Wide-Band Amplifier Stage

Use Scenario: Final-stage amplification of RGB or composite video signals driving CRT electron gun modulation.

IC Role / Device Role / Timing Role: NPN switch/amplifier operating in Class-A or Class-AB mode with fast turn-on/turn-off transitions.

Use Value: Delivers 1.3 W dissipation and 400 MHz f_T to preserve luminance/chrominance fidelity without phase shift.

Use Scenario: Broadband signal conditioning in test equipment or broadcast monitors requiring flat 0–10 MHz response.

IC Role / Device Role / Timing Role: Linear gain block with minimal group delay variation across frequency band.

Use Value: Low C_re (1.7 pF) and high V_CEO (−120 V) enable stable wideband operation without neutralization networks.

Horizontal Deflection Output

High-Voltage Switching Load Driver

Use Scenario: Driving flyback transformer primary winding in CRT horizontal scan circuits.

IC Role / Device Role / Timing Role: High-voltage, medium-current switch synchronized to line frequency (15.734 kHz).

Use Value: V_CEO ≥ −120 V withstands flyback spikes; TO-126ML tab enables direct heatsink mounting for pulsed dissipation.

Use Scenario: Controlling high-impedance loads such as CRT focus/anode supplies or EHT regulation stages.

IC Role / Device Role / Timing Role: Linear regulator pass element or precision current source in HV feedback loops.

Use Value: Tight h_FE binning (h_FE1: 20–120) supports accurate current mirroring and stable loop gain.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN high-frequency video output applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
2SC3953 (standard version)	No "E-PM-ON" suffix; same die, identical electrical specs, but unspecified tape-and-reel packaging or marking variant.	Same CRT video output use; no functional difference in circuit design or layout.	Select when standard reel packaging suffices and traceability to ON Semiconductor legacy sourcing is not required.
MJD127G	Lower f_T (150 MHz), higher V_CEO (−140 V), TO-220 package - larger footprint, higher thermal mass.	Suitable for lower-bandwidth deflection drivers where PCB space allows TO-220 mounting.	Choose only if higher voltage margin outweighs bandwidth loss and board area penalty.

Compared with 2SC3953E-PM-ON, the standard 2SC3953 offers identical performance in a non-specified packaging format, while MJD127G trades 250 MHz bandwidth for 20 V higher breakdown and TO-220 thermal robustness - making it viable only where video fidelity is secondary to voltage safety margin.

Availability

2SC3953E-PM-ON is available at Aetrix Electronics and suitable for high-definition CRT display video output, wide-band amplifier stages, and horizontal deflection circuits requiring stable component supply, long-lifecycle support, and consistent parametric binning.

Supply support for 2SC3953E-PM-ON includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

SANYO Electric Co., Ltd. was a Japanese semiconductor manufacturer specializing in analog and power devices for consumer electronics, particularly CRT-based display systems before its acquisition by Panasonic in 2011.

The 2SC3953E-PM-ON belongs to SANYO's high-frequency bipolar transistor product line, engineered specifically for video output amplification in high-definition CRT televisions and monitors - emphasizing f_T, V_CEO, and Cre optimization over general-purpose switching.

FAQ

What is the maximum junction temperature rating for the 2SC3953E-PM-ON?

The 2SC3953E-PM-ON has a maximum junction temperature (T_j) of 150 °C, as specified in SANYO's TS No.2437-1/4 documentation. This rating applies under steady-state conditions with proper heatsinking and must not be exceeded even momentarily during operation. Derating curves in the datasheet show allowable power dissipation versus ambient temperature, confirming 1.3 W at T_c = 25 °C and reduced capability above that point. Thermal design for the 2SC3953E-PM-ON must ensure junction temperature remains within this limit across full operational duty cycles.

Is the 2SC3953E-PM-ON pin-compatible with the 2SA1538 PNP transistor?

The 2SC3953E-PM-ON and 2SA1538 share identical TO-126ML package outlines and pin assignments (Emitter–Collector–Base), enabling direct complementary placement in push-pull video output stages. Both devices have matching thermal and mechanical footprints, allowing symmetric PCB layout and heatsink mounting. However, polarity reversal means base drive polarity and bias network orientation must be inverted between the two - the 2SC3953E-PM-ON is not a drop-in replacement for the 2SA1538, but they are designed as matched complementary pairs for dual-rail amplifier designs.

What does the "E-PM-ON" suffix indicate in 2SC3953E-PM-ON?

The "E-PM-ON" suffix identifies a specific manufacturing variant of the 2SC3953 transistor produced under ON Semiconductor's post-acquisition legacy sourcing program. "E" denotes enhanced binning consistency, "PM" indicates tape-and-reel packaging per EIA-481 standards, and "ON" confirms ON Semiconductor as the current authorized source. Electrical specifications remain identical to the original SANYO 2SC3953, but traceability, marking, and packaging comply with ON Semiconductor's quality and logistics protocols - critical for BOM continuity in legacy CRT repair and industrial maintenance programs using the 2SC3953E-PM-ON.

Can the 2SC3953E-PM-ON be used in Class-D audio amplifier output stages?

No, the 2SC3953E-PM-ON is not suitable for Class-D audio amplifier output stages. Its design targets linear video amplification - optimized for f_T, V_CEO, and C_re, not switching speed, SOA robustness, or gate-drive compatibility. The device lacks specified safe operating area (SOA) curves for repetitive pulse conditions typical in Class-D operation and exhibits relatively high V_CE(sat) (−1.0 V) and slow turn-off characteristics unsuited for >200 kHz PWM switching. Audio applications requiring high-efficiency switching should use purpose-built MOSFETs or dedicated audio output transistors instead of the 2SC3953E-PM-ON.

What is the typical h_FE range for the 2SC3953E-PM-ON at I_C = −100 mA?

The 2SC3953E-PM-ON exhibits h_FE2 = 30–100 at V_CE = −10 V and I_C = −100 mA, per SANYO's TS No.2437-2/4 specification sheet. This range reflects the second h_FE binning grade, distinct from h_FE1 (20–120 at I_C = −50 mA). Designers must account for this spread when calculating base drive requirements for linear video output stages - especially under peak current conditions - and may require emitter degeneration or feedback stabilization to maintain gain consistency across the 2SC3953E-PM-ON population.

2SC3953E-PM-ON Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-225AA, TO-126-3

Packaging:: Bulk

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 200 mA

Voltage - Collector Emitter Breakdown (Max):: 120 V

Vce Saturation (Max) @ Ib, Ic:: 1V @ 3mA, 30mA

Current - Collector Cutoff (Max):: 100nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 10mA, 10V

Power - Max:: 1.3 W

Frequency - Transition:: 400MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-126ML

2SC3953E-PM-ON FAQ

1.How can I place an order for 2SC3953E-PM-ON through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SC3953E-PM-ON on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 2SC3953E-PM-ON reliable?

The price and inventory of 2SC3953E-PM-ON are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SC3953E-PM-ON is usually 5 days.

3.What payment methods are accepted for 2SC3953E-PM-ON?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SC3953E-PM-ON transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SC3953E-PM-ON?

2SC3953E-PM-ON orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SC3953E-PM-ON order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 2SC3953E-PM-ON?

For technical support, including 2SC3953E-PM-ON datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SC3953E-PM-ON requirements.

6.How does Aetrix verify that 2SC3953E-PM-ON is sourced from the original manufacturer or authorized distributors?

All 2SC3953E-PM-ON products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 2SC3953E-PM-ON meets industry standards.

7.What is the process for return or replacement of 2SC3953E-PM-ON?

All 2SC3953E-PM-ON units undergo pre-shipment inspection (PSI). If there is an issue with 2SC3953E-PM-ON, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 2SC3953E-PM-ON part is unused and in its original packaging.

Return procedure for 2SC3953E-PM-ON:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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